Coupling efficiency of multimode beam to fiber in atmospheric turbulence

Gökçe M. C., Baykal Y., Ata Y.

Journal of Quantitative Spectroscopy and Radiative Transfer, vol.303, 2023 (SCI-Expanded) identifier

  • Publication Type: Article / Review
  • Volume: 303
  • Publication Date: 2023
  • Doi Number: 10.1016/j.jqsrt.2023.108590
  • Journal Name: Journal of Quantitative Spectroscopy and Radiative Transfer
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Artic & Antarctic Regions, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: Fiber coupling efficiency, Fiber optics, Multimode beam, Optical wave propagation, Optical wireless communication, Single-mode fiber
  • TED University Affiliated: Yes


Atmospheric turbulence causes wavefront distortions in the propagated laser beam. By the beam shaping of the transmitted laser, wavefront distortions can be mitigated effectively. In this paper, we consider a shaped laser modeled by multimode beams at the transmitter and investigate the coupling of the light wave to a single-mode fiber under the atmospheric turbulence effect. We derive the light power on the coupling lens and light power accepted by the fiber core using the extended Huygens-Fresnel principle. Then, the fiber coupling efficiency (FCE) is scrutinized for different system parameters such as the number of modes of the transmit laser, link distance, structure constant of atmosphere, focal length and radius of the coupling lens, wavelength, source size, and the number of speckles (NOS).